Advantages and disadvantages of dry-type transformers and oil-immersed transformers
Writer： Hengfeng you electric Time：2023-04-19 views：times
Dry-type transformers and oil-immersed transformers have their own advantages and disadvantages. The oil is low in cost and easy to maintain, but it is flammable and explosive. Due to the good fire resistance, the drying change can be installed in the load center to reduce voltage loss and power loss. However, the drying change is expensive, large in size, poor in moisture and dust resistance, and high in noise.
One is the appearance.
Different transformers can directly see the iron core and coil, while oil-type transformers can only see the outer shell of the transformer;
The second is different leadership styles.
Most dry-type transformers use silicone rubber bushings, while oil-type transformers mostly use ceramic bushings;
The third is that the capacity and voltage are different.
Dry-type transformers are usually used for power distribution. Most of the capacity is less than 1600KVA, the voltage is less than 10KV, and some can reach the voltage level of 35KV. Oil-type transformers can achieve all capacities and voltage levels from small to large. Voltage: The UHV 1000KV test line under construction must be an oil-type transformer.
4. Different insulation and heat dissipation.
Dry-type transformers are usually insulated by resin, relying on natural air cooling and large-capacity fan cooling, and oil-type transformers are insulated by insulating oil. The oil insulation in the transformer creates a tropical transformer radiator (chip).
5. Applicable places.
Dry-type transformers are mainly used in places where fire and explosion protection are required. Generally speaking, large buildings and high-rise buildings are easy to use; oil-type transformers may cause oil to pop up or leak after failure, and are mainly used outdoors. There is also a website for digging oil ponds.
6. The carrying capacity is different.
Generally speaking, dry-type transformers should be operated under rated capacity, while oil-type transformers should have better overload capacity.
Seven, the cost is different.
For transformers of the same capacity, the purchase price of dry-type transformers is much higher than that of oil-type transformers.
